4 Channel Amplifier with IC LM1877N

4 Channel Amplifier with IC LM1877N
This is a 4 channel amplifier circuit build based two IC LM1877N. A LM1877 can be used for a stereo amplifier. The circuit ideally suited for use with quadraphonic equipment such as a Sound Blaster Live card. There is no volume control in this circuit, audio levels being directly controlled from the sound card itself. (more…)

Quad amplifier 40W

Quad amplifier 40W
This circuit provides a total of four speakers 4 ohms and 40W at 12v powered. It is therefore ideal for use in the car. Total harmonic distortion is rather high, about 10% at full power. But with half the power requirements (20W) is less than 2%. Anyway it is not intended to have a high performance system in the car. (more…)

30W, 4 channel car amplifier

30W, 4 channel car amplifier
This 4 channel car amplifier comprises only with a single TDA7386 integrated circuit and a few additional components, four independent amplifier channels to build a true multi-channel audio system. Based on the chip was originally designed for car audio, but this amplifier is also ideal for computers with a sound card as the SoundBlaster Live! Creative Labs Inc or Diamond Multimedia Monster Sound / S3. (more…)